<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML">
<head>
<script type="text/javascript">

function boom()
{
  var m = document.getElementById("m");
  m.parentNode.removeChild(m);
  document.getElementById("s").appendChild(document.createTextNode("c"));
}

</script>
</head>
<body onload="boom();">

<m:mrow>
  <span>
    <m:msup id="m"/>
    <div style="-moz-column-width: 1px;">
      <m:munderover/>
      <m:msqrt/>
    </div>
  </span>
  <span id="s"></span>
</m:mrow>

</body>
</html>
